桃源暗鬼外伝～月と桜の狂争曲～

桃源暗鬼外伝～月と桜の狂争曲～, Tougen Anki Gaiden ~tsuki To Sakura No Kyousoukyoku~

An official spin-off that delves into the untold past of the fiercest battle maniacs in the Momotarou Organization — Tsukuyomi Momoka and Ousuke Momozumi!!